This is a list for all of social platform (and other services) that uses ActivityPub protocol. Sorted either by the most popular or the project maturity.
Cover by David Revoy (CC-BY-SA 4.0): https://www.davidrevoy.com/article1043/my-neighbor-mastodon-and-fediverse/show
Not on list: Librate (https://codeberg.org/mjh/LibRate development halted)
Federated and open-source social network with no ads, 500-character limit, custom emojis, and content warnings, emphasizing privacy and personal interaction.
9 million+ users across instances.
X, with more advance usability and feature.
Most popular in East Asia. 1 million+ users. Emphasize on playful social media. Unique feature:
- custom emoji reaction (like Discord)
- games
- groups
- custom theme, interface and UI
- achievement
- optional community ads (useful for promoting indie games, art event, etc)
- optional private following/followers
- Misskey-flavoured markdown
Note: Due to nature of privacy, most of instances privated their MAU users. Almost all statistics are inaccurate.
Federated image sharing platform prioritizing privacy, safety, and user control, ad-free operation, no algorithms, open-source, and supports self-hosting.
Lemmy is similar to sites like Reddit, Lobste.rs, or Hacker News: you subscribe to forums you're interested in, post links and discussions, then vote, and comment on them. Behind the scenes, it is very different; anyone can easily run a server, and all these servers are...
PeerTube is a free, decentralized and federated video platform developed as an alternative to other platforms that centralize our data and attention, such as YouTube, Dailymotion or Vimeo. But one organization hosting PeerTube alone may not have enough money to pay for bandwidth...
WriteFreely is an open-source, minimalist, federated, self-hosted blogging platform. It was built for and by 
Write.as and can be used to power a similar community or just a single blog.
A community forum allows you to engage and retain customers, keeping them interested and up-to-date with your latest product or service.
General forums. Native ActivityPub support.
General social media, including microblogging, macroblogging, and anything in between!
Wafrn is a social network inspired by tumblr, that also can connect with other wafrn instances, or with mastodon, pleroma, firefish and other platforms that use activitypub.
Tumblr. Supports booth ActivityPub and AtProto (Bluesky) combined.
Hackers' Pub is an ActivityPub-enabled social network for hackers. You can think of it as a federated version of DEV Community with a Mastodon-like timeline.
DEV Community -alike
Pleroma is a free, federated social networking server built on open protocols. It is compatible with GNU Social, Mastodon, and many other ActivityPub and OStatus implementations.
Old
Vutuv is a free and fast career network. More focused on the the exchange of contact information and the rating of skills. The networking for people.
LinkedIn alternative for fediverse.
Friendica is a distributed social network application. Which allow users to connect with others via their own Friendica server, but may also fully integrate contacts from other platforms including Twitter, diaspora*, Pump.io and StatusNet into their 'newsfeed'.
Old
Facebook. Includes group and social circle feature.
Hubzilla is a powerful platform for creating interconnected based websites featuring a decentralised identity, communications, and permissions framework built using common webserver technology. Hubzilla is very suitable for communities (of any size).
Decentralized social network on the fediverse. Usable for both #microblogging and full length #blog posts. Editing both content and replies is supported.
Elgg is a leading open source social networking engine which can be used to power your social network.
VK SNS
Hollo is a federated single-user microblogging software powered by Fedify. Although it is for single-user, it is designed to be federated through ActivityPub, which means that you can follow and be followed by other users from other instances, even from other software that...
Single user instance
Ktistec is an ActivityPub server. It is intended for individual users, not communities of users, although support for additional users will be added in the future. It is designed to have few runtime dependencies -- for example, it uses SQLite as its database, instead of...
Single user instance
Stegodon is an SSH-first federated blogging platform. Users connect via SSH to create notes in a terminal interface. Notes federate to the Fediverse via ActivityPub and are available through RSS feeds and a web interface.
Microblogging via SSH
This is a fork of Pleroma, which is a microblogging server software that can federate (= exchange messages with) other servers that support ActivityPub. What that means is that you can host a server for yourself or your friends and stay in control of your online identity, but...
Sharkey is a Misskey fork following upstream changes when possible, with added features. Like any other ActivityPub software Sharkey can interface with the thousands of servers that form the fediverse, an interconnected social network, working in tandem with software such as...
Soft-fork of
Misskey
Iceshrimp is a derivative of Misskey that has been offering practical solutions, enhancements, and improvements since 2023. It is designed to address user needs directly, focusing on delivering straightforward fixes and features that users find valuable.
Open-source, self-hosted streaming platform supports Android, iOS, podcasts, uploads, sharing, no ads or tracking, federated across decentralized instances.
Open-source self-hosting for podcasts, offering direct audience interaction, decentralized Fediverse integration, analytics, promotion tools, monetization, and distribution.
Share, discover, and create short videos across the social web. An open-source alternative that puts creators and communities first, built on federated technology for true ownership and privacy.
Tiktok-alike
Manyfold is an open source, self-hosted web application for managing a collection of 3d models, particularly focused on 3d printing.
3D model social sharing. Useful for 3D printing community.
Owncast is a self-hosted live video and web chat server for use with existing popular broadcasting software. Point your live stream at a server you personally control and regain ownership over your content.
Books, Games, Musics, Animation, and so on!
BookWyrm is a social network for tracking your reading, talking about books, writing reviews, and discovering what to read next. Federation allows BookWyrm users to join small, trusted communities that can connect with one another, and with other ActivityPub services like...
NeoDB is an open-source software and global community platform since 2021. It helps users to manage and explore collections, reviews, and ratings for various cultural products, including books, movies, music, podcasts, games, and performances.
Bangumi-alike. Their main community is in Chinese.
Bangumi: Chinese animation, live-action, game, and musics tracker and review.
Tvmarks is a tv tracking site that you own yourself and can connect the Fediverse, interacting with other Tvmarks sites as well as Mastodon/FireFish/any text-based ActivityPub platform.
Discourse is an open source discussion platform built for the next decade of the Internet. A modern forum, everything's been redesigned to be easy.
Optional support. https://meta.discourse.org/t/activitypub-plugin/266794
PieFed is a link aggregator, a forum, a hub of social interaction and information, built for the fediverse. the focus is on individual control, safety, and decentralised power.
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